Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DARIUSZ J NASIEK M.D.
NPI 1285636852
Anesthesiology in Passaic, NJ

Q: What is Dariusz Nasiek's NPI number?

The NPI number for Dariusz Nasiek is 1285636852. It was assigned to this individual provider in the NPPES registry on August 12, 2005.

Q: What is Dariusz Nasiek's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Dariusz Nasiek was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 38 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 12, 2005PECOS EnrolledAccepts Medicare Assignment

350 BOULEVARD, PASSAIC, NJ 07055(973) 365-4300 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dariusz J Nasiek M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DARIUSZ J NASIEK M.D. (NPI 1285636852) is an individual anesthesiology provider in Passaic, New Jersey, licensed in New Jersey (25MA06262500) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1989).

NPPES Registry Identity

NPI1285636852

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameDARIUSZ J NASIEKCredential: M.D.

Location Address350 BOULEVARDPassaic, NJ 07055-2840

Mailing AddressPo Box 343Midland Park, NJ 07432-0343 · (201) 804-2800

Phone(973) 365-4300

Sole ProprietorNo

Medical School CMSOtherGraduated 1989

Enumeration DateAugust 12, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1285636852 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in NJ · 25MA06262500

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

350 BOULEVARD, Passaic, NJ 07055

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Other Identifiers 1

Medicaid0040932NJ

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dariusz J Nasiek M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9537132188

PECOS Enrollment IDI20040813000049

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

30 services11 patients

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ASHWIN NELLIPARAMBIL JITHEESH

Student in an Organized Health Care Education/Training Program

350 BOULEVARD, ST. MARY'S HOSPITAL MEMORIAL BUILDING, ROOM 416
PASSAIC, NJ 07055

Passaic County (404) 503-3936

BAY RADIATION ONCOLOGY,P.L.L.C

Radiology (Therapeutic Radiology)